@article{414216,
      author = {Denning, Keith M. and Kessler, Brett, and Leben, William  Ronald,},
      url = {http://library.usi.edu/record/414216},
      title = {English vocabulary elements [electronic resource] /},
      publisher = {Oxford University Press,},
      recid = {414216},
      pages = {xv, 320 p.},
      address = {Oxford ;},
      year = {2006},
}